witherell



2 SheeLsSheeL 1.

E. A. WITHERELL. Magneto-Electric Machine.

No. 223,623. Patented Jan. 13 1880;

k i E I 2 Sheets-Sheen 2. E. A. WITHERELL. Magneto-Electric Machine.

No. 223,623. Patented Jan. 13, 1880..

N.PETERS, PHUTO-LITHOGRAPHER, WASHINGTON. n c.

UNITED STATES PATENT OFFICE.

ERIE A. WITHERELL, OF GALESBURG, ILLINOIS, ASSIGNOR TO HERMAN E.

DICK, OF SAME PLACE.

MAGNETO-ELECTRIG MACHINE.

SPECIFICATION forming part of Letters Patent No. 223,623, dated January 13, 1880,

Application filed August 16, 1879.

To all whom it may concern Be it known that I, ERIE A. WITIIE ELL, of Galesburg, in the county of Knox and State of Illinois, have invented certain new and useful Improvements in Magneto-Electric Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification, in which- Figure 1 is a perspective view of my invention inclosed in apocket-case. Fig. 2 is a perspective view, showing the case open. Fig. 3 is a sectional view in the line x min Fig. 5. Fig. 4 is a sectional view in the line 3 3 in Fig. 3. Fig. 5 is a sectional view in the line z z in Fig. 3. Fig. 6 is a sectional view in the line 2 2 in Fig. 3. Fig. 7 is a side elevation, showing the machine in favorable position for operation. v

This invention relates to magneto-electric machines of that class in which electric currents are induced by an armature encircled by a wire coil and moving in the magnetic field of a magnet, and more particularly to that class of such machines adapted by compactness of form for medical uses.

The object of this invention is to produce a machine of comparatively great electro-motive force with the greatest possible compactness of form, the whole machine being included within or between the arms or limbs of the magnet.

The invention consists, first, in combining with a horseshoe-magnet an armature formed of a bundle of soft-iron wires, encircled by a wire coil wound transversely round a bundle of wires in the manner hereinafter to be described; second, in an armature arranged to revolve between the poles of ahorseshoe-magnet and in a plane cutting both ends of the magnet transversely.

The invention further relates to construction and combination of parts hereinafter described, and set forth in the claims hereto annexed.

Referring to the drawings by letters, A represents an ordinary horseshoe-magnet, with a plate of wood or other non-conductor, B,f1xed between the limbs a a of the magnet, and extending from its bend a to within a short distance of the poles, or in any other convenient location, to form bearings for the operating parts, as hereinafter described.

0 is a shaft, its lower end, 0, stepped in the bend a of the magnet for a bearing, and its upper portion surrounded by a sleeve, D, be-

jects from the plate B above a collar, 0, on

said shaft.

F is a bundle of soft-iron wires, placed parallel with each other in a spool, G, of wood or other suitable material, around which spool the ordinary insulated wire H is wound. I is a case of brass or other conducting material, partially surrounding the wire coil H, as shown at Fig. I of the drawings.

A paper wrapping may be placed between the coil H and easing I for greater protection of the coil.

The case I is secured to the upper end of the sleeve D, so as to be rotated with said sleeve, and one end, h, of the wire coil II is in contact with the case I, and thus in connected line with the sleeve D. The other end, h, of the wire coil is in contact with the upper end of the shaft 0, which is insulated from the case I. (See Fig. 3 of the drawings.)

The wires F are at right angles to the shaft 0, and are located, preferably, with their central longitudinal line in a line which connects the poles of the magnet.

J is a circuit-breaker, formed of a springplate secured at its midlength portion to the plate B, and its outer end in contact with one 5 IOO in rotating the sleeve D its flat sides will not touch the spring-plate J, but its extended sides, will bear against it.

K K are ordinary conducting-wires secured to the central part of plugs 7c k, one of which, 70, may be inserted in a socket in the plate B to bring it in contact with the bearing-plates E, and the other, inserted in a socket in same plate to bring it in contact with the circuit-breaker J.

L is a collar, of rubber or other suitable material, secured upon the sleeve D, and gears by frictional contact with the face of a wheel, M, which is provided with an annular ring, m, of rubber or other suitable material, and may be rotated by a crank, m, to impart rotary movement to the shaft 0, sleeve D, and armature F.

P is a case inclosing the apparatus, and is formed of a part, P, which incloses all of the magnet except the projecting ends where the armature rotates. One side, P, of this portion of the case is secured to the magnet, and the other side, P, is hinged thereto, so that it may be turned back, as shown at Fig. 2 of the drawings, for access to the actuating devices. The shaft m of the wheel M is journaled in the part P of the case, and hence is .turned back with the-part P in opening it,

as shown at last figure named. An end cap, Q, completes the inclosing ease and holds the part P in a closed position when in place.

In operation, the cap Q, is removed, and as a convenient position for the machine it may be placed with one end resting and supported on and by the plugs K K, as shown at Fig. 7 of the drawn] The part P of the case being closed, turning the crank m will rotate the armature F, bringing each of its ends alternatel y to the north and south poles of the magnet, and thus successively magnetizing it in opposite directions, and thus inducing two opposite currents in the wire coil at each complete revolution of the armature.

The construction of the armature of a bun dle of wires such as described greatly increases its et'liciency and rotation in the position and manner described, will greatly facilitate the rapid change of magnetization and change of direction of current, and so nearly overcome the coercive force of the armature that great speed may be given without danger of increasing the speed beyond that at which the greatest change of magnetization occurs. In addition to diminishing its coercive force by the rotation of the armature, as described, its rotation in the manner described and in the most intense part of the field of the magnet will greatly increase the current induced.

The operation of the circuit-breaker J in reversing and rendering the currents intermittent will be obvious.

Locating all the operating parts between the limbs of the n'lagnet givesgreat compactness to the machine, and thus specially adapts it for medical use.

What I claim as new, and desire to secure by Letters Patent, is

1. In a magneto-electric machine, an armature and wire coil, as described, provided with the rotating device passing through bearings E attached to non-conducting plates B, and a circuit-breaker, J, all located within the limbs of a horseshoe-magnet, substantially as described.

2. In a magneto-electric machine, an armature and wire coil, as described, with the rotating mechanism located between the limbs of a horseshoe-magnet and inclosed by a case having one side secured to the magnet and the other side hinged thereto, substantially as described, and for the purpose set forth.

3. In combination with the horseshoe-magnet, an armature formed of a bundle of straight wires and an encircling coil of wire encircled by a case, I, sleeve D, shaft 0, circuitbreaker J, and bearings E, substantially as described, and for the purpose specified.

at. In combination with the horseshoe-magnet, armature, wire coil, case I, sleeve D, shaft 0, circuit-breaker J and bearings E, the frictionwheels M and L, substantially as and for the purpose specified.

In testimony that I claim the foregoing as my own I atliX my signature in presence of two witnesses.

ERIE A. WITIIERELL.

Witnesses:

H. A. ALLEN, M. P. DELoNG. 

